Articles | Volume 12, issue 6
Research article
02 Jun 2021
Research article |  | 02 Jun 2021

Regional centroid moment tensor inversion of small to moderate earthquakes in the Alps using the dense AlpArray seismic network: challenges and seismotectonic insights

Gesa Maria Petersen, Simone Cesca, Sebastian Heimann, Peter Niemz, Torsten Dahm, Daniela Kühn, Jörn Kummerow, Thomas Plenefisch, and the AlpArray and AlpArray-Swath-D working groups

Data sets

ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS NGDC-24 C. Amante and B. Eakins

Time Domain Moment Tensor (TDMT) L. Scognamiglio, E. Tinti, and M. Quintiliani

European-Mediterranean Regional Centroid-Moment Tensors Catalog (RCMT) S. Pondrelli

CEA/DASE broad-band permanent network in metropolitan France RESIF

RESIF-RLBP French Broad-band network, RESIF-RAP strong motion network and other seismic stations in metropolitan France RESIF

Regional Seismic Network of North Western Italy University Of Genova

Czech Regional Seismic Network Institute Of Geophysics

Trentino Seismic Network Geological Survey - Provincia Autonoma Di Trento

GEOSCOPE, French Global Network of broad band seismic stations Institut De Physique Du Globe De Paris (IPGP) and Ecole Et Observatoire Des Sciences De La Terre De Strasbourg (EOST)

National Seismic Networks of Switzerland Swiss Seismological Service - SED - At ETH Zurich

Austrian Seismic Network ZAMG - Zentralanstalt Für Meterologie Und Geodynamik

Mediterranean Very Broadband Seismographic Network (MedNet) MedNet Project Partner Institutions

Hungarian National Seismological Network Kövesligethy Radó Seismological Observatory - Geodetic And Geophysical Institute, Research Centre For Astronomy And Earth Sciences, Hungarian Academy Of Sciences (MTA CSFK GGI KRSZO)

GEOFON Seismic Network GEOFON Data Centre

Rete Sismica Nazionale (RSN) INGV Seismological Data Centre

BayernNetz Department Of Earth And Environmental Sciences, Geophysical Observatory, University Of Munchen

SXNET Saxon Seismic Network Leipzig University

North-East Italy Broadband Network OGS - Istituto Nazionale Di Oceanografia E Di Geofisica Sperimentale - and University Of Trieste

Thüringer Seismologisches Netz (TSN) Jena

North-East Italy Seismic Network OGS - Istituto Nazionale Di Oceanografia E Di Geofisica Sperimentale

Model code and software

Grond - A probabilistic earthquake source inversion framework S. Heimann, M. Isken, D. Kühn, H. Sudhaus, A. Steinberg, H. Vasyura-Bathke, S. Daout, S. Cesca, and T. Dahm

Short summary
The Alpine mountains are known for a complex tectonic history. We shed light onto ongoing tectonic processes by studying rupture mechanisms of small to moderate earthquakes between 2016 and 2019 observed by the temporary AlpArray seismic network. The rupture processes of 75 earthquakes were analyzed, along with past earthquakes and deformation data. Our observations point at variations in the underlying tectonic processes and stress regimes across the Alps.